⌘K
Biotope - Typologie Européenne EUNIS
D4 - Niveau 2 : Bas-marais riches en bases et tourbières des sources calcaires
Description
Peatlands, flushes and vegetated springs with calcareous or eutrophic ground water, within river valleys, alluvial plains, or on hillsides. As in poor fens, the water level is at or near the surface of the substratum and peat formation depends on a permanently high watertable. Excluded are reedbeds (C3, D5).
Taxons (Liens actifs si espèces présentes)
D4.2 - Niveau 3 : Communautés riveraines des sources et des ruisseaux de montagne calcaires, avec une riche flore arctico-montagnarde
Description
Rare Alpine, peri-Alpine, northern British and periarctic pioneer communities colonizing gravelly, sandy, stony, sometimes somewhat argilous or peaty, calcareous sedimentary substrates soaked by cold water, in moraines and on the edge of springs, rivulets, glacial torrents of the alpine or subalpine levels, or on alluvial sands of pure, cold, slow-flowing rivers and calm backwaters. The highly characteristic constituents, with a boreoarctic or glacial relict distribution, are Carex bicolor, Carex microglochin, Carex maritima, Carex atrofusca, Carex vaginata, Kobresia simpliciuscula, Scirpus pumilus, Juncus arcticus, Juncus alpinoarticulatus, Juncus castaneus, Juncus triglumis, Typha minima, Typha lugdunensis, Typha shuttleworthii, Tofieldia pusilla; they are often accompanied by Carex davalliana, Carex dioica, Carex capillaris, Carex panicea, Carex nigra, Blysmus compressus, Eleocharis quinqueflora, Scirpus cespitosus, Primula farinosa, Equisetum variegatum, Drepanocladus intermedius, Campylium stellatum.
Taxons (Liens actifs si espèces présentes)
Amphiura sp. ( Esp. caract. )
Anthoxanthum sp. ( Esp. diagn. )
Caprellidea sp. ( Esp. caract. )
Carex bicolor All., 1785 ( Esp. diagn. )
Carex microglochin Wahlenb., 1803 ( Esp. diagn. )
Carex nigra All., 1785 ( Esp. caract. )
Corallinaceae sp. ( Esp. caract. )
Corallinaceae sp. ( Esp. caract. )
Corallinaceae sp. ( Esp. caract. )
Deschampsia sp. ( Esp. caract. )
Didemnidae sp. ( Esp. caract. )
Equisetum variegatum auct. non Schleich. ex F.Weber & D.Mohr, 1807 ( Esp. caract. )
Gammaridea sp. ( Esp. diagn. )
Halophila sp. ( Esp. caract. )
Juncus alpinoarticulatus Chaix, 1785 ( Esp. caract. )
Leptosynapta sp. ( Esp. caract. )
Lysilla sp. ( Esp. caract. )
Nemertea sp. ( Esp. caract. )
Ophiuroidea sp. ( Esp. caract. )
Polycirrus sp. ( Esp. caract. )
Polysiphonia sp. ( Esp. caract. )
Sphaerosyllis sp. ( Esp. caract. )
Syllis sp. ( Esp. diagn. )
Terebellidae sp. ( Esp. caract. )
Thalassia sp. ( Esp. caract. )
Thyasira sp. ( Esp. caract. )
Tofieldia pusilla (Michx.) Pers., 1805 ( Esp. diagn. )
Anthoxanthum sp. ( Esp. diagn. )
Caprellidea sp. ( Esp. caract. )
Carex bicolor All., 1785 ( Esp. diagn. )
Carex microglochin Wahlenb., 1803 ( Esp. diagn. )
Carex nigra All., 1785 ( Esp. caract. )
Corallinaceae sp. ( Esp. caract. )
Corallinaceae sp. ( Esp. caract. )
Corallinaceae sp. ( Esp. caract. )
Deschampsia sp. ( Esp. caract. )
Didemnidae sp. ( Esp. caract. )
Equisetum variegatum auct. non Schleich. ex F.Weber & D.Mohr, 1807 ( Esp. caract. )
Gammaridea sp. ( Esp. diagn. )
Halophila sp. ( Esp. caract. )
Juncus alpinoarticulatus Chaix, 1785 ( Esp. caract. )
Leptosynapta sp. ( Esp. caract. )
Lysilla sp. ( Esp. caract. )
Nemertea sp. ( Esp. caract. )
Ophiuroidea sp. ( Esp. caract. )
Polycirrus sp. ( Esp. caract. )
Polysiphonia sp. ( Esp. caract. )
Sphaerosyllis sp. ( Esp. caract. )
Syllis sp. ( Esp. diagn. )
Terebellidae sp. ( Esp. caract. )
Thalassia sp. ( Esp. caract. )
Thyasira sp. ( Esp. caract. )
Tofieldia pusilla (Michx.) Pers., 1805 ( Esp. diagn. )
Analyse Ecologie du milieu (En fonction des espèces présentes)
Faible
Forte
— nb espèces indicatrices par classe
Humidité
Réaction du sol (pH)
Nutriments
Lumière
Matière organique
Granulométrie
Salinité